Friction transmission mechanism.



J. P. DAVIS.

FRICTION TRANSMISSION MECHANISM.

, APPLICATION FILED SEPT.27,1907. 11,94?

mmmw Feb. 9, 1909.

2 SHEETS-SHEET l.

v Ina/621102? J .'P. DAVIS.

FRICTION TRANSMISSION MECHANISM.

APPLICATION FILED SEPT. 2 7, 1907.

Patented Feb. 9, 1909.

2 SHEETS-SHEBT 2.

' power applied to the transmission shall be. used for driving the drivcnshaftinstead of being dive'rtedin a large measure to producl the direction of the arrow and nlarged.

movement of the sleeve ante {l mitedJStates, residing at Chicago', in the-countyofCdok and State of 1111-, nois; ghava invented a new and useful Iminss} ,barsA and 5 and end, bars 6 and 7. 'A drive ends, as by a key 10, a'head 9,formed preferably as shown in the drawings, and having- 'atubular. extension 11 extending beyond the v darrying a friction-roller 19, is confinedly joumaled enthe shaft, the. sleeve'18. fitting 'and the roller ca i'ried therebymay beaccom-x 5 5 Farmer OFFICE;

. a on'stem ze; 0F catc es, lemmas.

prominent Eriction Irensmission' Mechanism-,iof whiehfthe following 1s a specificaobject is to provide a construction of frfiction-transmission in: which thrust upon its bearings will be reduced to the minimum and thus practically all of the.

ing thrust upon the bearings.

Referring to the accompanying drawingsl ijgure 1 shows, bya plan view, a fric hon-transmission mechanism. embodying my invention, Fig. 2 is a sect-ion taken at the line 2 on Fig. 1, viewed in the direction of the arroiv and enlarged and Fig.- 3, a section taken at the line 3 on Fig. 1, viewed in y invention,,as illustrated in the drawplied ,to an automobile construc-- tion in W ych, the support ng frame forthe parts, of themechamsm comprises the side shaft 8-, adapted to be driven from any suitable source, as byan automobile engine '(qnot shown), has rigidly secured'on one of its end of the shaft: 10. A shaft -12 having a forked end providing legs 13 and l'sti'add-ling. a counter or -driven shaft 15 ,and the end-bar 7, is providedat its'opposi'te end with-anexpanded portion- 16 in the form of. QIJIi-Idisk fastened on theiinnerendiofthe shaft,

; 1'2, asrby a bolt- 16.

Between this disk' 16 and af head 17, fixed totheshaft, a sleeve 18,

atone end lflifllBCSS '20 contained in the head 17. "fl-hesleeve 18 atjitsgop'positeend contains: a longitudinal" groove '21 in which arkeyv 22 fixed in theenfension' 1,1,1pr0jects tocause the sleeve to; beQrotated \vithi the shaft '8, end- }alsoito ,pf' 'mi't longitudinal extension 11;; The. movementpf "the sleeve.

p1-ished' 'by any I suitable, means, as for stance by'the means shown whichfcompri bi rmene m ns s smy u gs-scs eatioa 01 ett s P semantics Su e s;

3 lever h relal'zitnilto the si nal at; 394,814;

j wa tes f at, altos-1 f f fii'lcrumed to -thebar' 7 at one end,

as indicated at 24, andpivoted between its ends,- asjindi'cated at 25, tothe leg-13. Thus by operating the lever 23 theroller 19 may be moved toward and away from the shaft 15.

The shaft'l'fi, which, inan automobile construction', may be the one geared to the loo. 1

driveh-uxle, is-ijournaled, near'its opposite ends, inbearings26, 26, to be movable longi tudi aially therein and to extend at right mtgl'es to the shaft 8. sThe shaft 15 has fixed on it, near its opposite ends, Within the frame sides, two frictlon-dlsks 27, 28, hair-- ing beveled surfaces 29 and 30, respectively; and on this shaft between these disks are journaled a pair of friction-disks 31 and. 32

to extend on opposite sides of the roller 19, these last-named disks being free to slidel-ongitudi-nally of the shaft. Each of the disks 31=and 32 has roller bearings confined between it and the shaft 15,- these bearings comprising a circular-series of rollers 33', with balls 31 at their opposite ends confined in-a bore 35 in each disk, by a cap 36, these hearings servingjto reduce the frictionbe tiveen'th'e disks 31 and 32and shaft carryingthem to the minimum, when the disks rotate in'a direction opposite to that of the shaft, as hereinafter explained.

In the illustrated embodiment vention, means for alternately clutching the disks 31: and 32 to the shaft 15 are provided,

the description of the preferable means being as follows: The'outer faces'of the hubs 37 of the disks 31 andl32 are provided with recesses 38 0f frusto-conical "shape in crossscctio'n, as represented,-these recessed hubs cooperating with cone clutches 39 and 40 fixed on the shaft 15 adjacent to the-disks of my in 31 and- 32, respectively, for causing the disks to rotate with the'shaft, as hereinafter explanned, 7 v .The roller 19 has a fiat periphery 41 and a'bevel-ed frictionsurface 42, and each of the disks 31 and32 has a flat bearing surface t ingm g dpn" opposite sides'of the surfaces, M the fiats'u rface 41 T and beveled ir aceflg au dte Journa in ively, b

are fr' 43 and'beveled surfacesffle sides, the lat-j :5

, tion illustrated in Fig. 1, the roller 50, beartween the disks 28, 32 and '31, thecdisk. 32

- and forth in their guides to move the rollers site directions for producing reversal ofthe pi.'-.'cted on opposite sides of its fulcrum, as

carried thereby toward and away from the shaft 15., Any suitable means for moving these rollers may be employed, the means shown, which serve to move them in 0 p0- shaft, comprising a lever 54 fulcrumed between its ends, as indicated at 55 on a bracket 56 secured tothe frame-bar 7, and

indicated at 57 and 58 between the legs of the respective shafts 46'and 47.

The friction surfaces of the rollers 49 and 50 are beveled, as indicated at 59 and 60 respectively, and serve to cooperate, as hereinafter explained, with the beveled surfaces on the respective disks 27 and 31, and 30 and 32.

Whenthe lever 54 is moved to the posiing at its beveled surface 60 against the beveled surfaces, 30 and 45 of the rollers 28 and 32 respectively, and thus exerting a wedging action between them, moves the disk 32 to the left in Fi l. The roller 19, hearing, as for examp e as illustrated in- Fig. 1 at its beveled surface, against the beveled surface 44 of the disk 32, arrests longitudinal movement of the disk 32 toward the left under the wedging action of the roller 50, and thus the continued wedging action of the last-referred to roller causes the disk 28 and with it the shaft 15 to move to the right in Fig. l thereby drawing the clutch 39 into engagement with the Wall. of the recess in the disk 31, with the result of clutching this disk to theshaft'and drawing it into engagement with the roller 19. The clutches 37 are so positioned on the shaft as to cause one or the other to be moved out of operative engagement With its cooperating disk when the shaft is moved either to the right or left, as the case may be. Thus when the shaft is moved" tothe right, as just explained, to cause the clutch adjacent to the disk 31 to engage with the latter, the clutch adjacent to the disk 32 is moved out of engagement with that disk, as represented in Fig. 1. \Vith the rollers 19 and 50 thus exerting wedging action bebeing free to rotate upon its roller bearin s about-theshaft15, operates as an idler, t e disks 28 and 31 being thus caused to rotate in the same direction. Lateral thrust of the rollers 19 and 50 is thus directed in equal de rees against the disks 28 and 31, and thus end thrust upon the shaft 15 is entirely eliminated. The speed of movement of the shaft 15 is regulated by movin the roller 19 toward and away from the siaft. In the position shown in Fig. 1, this roller contacts at its beveled surface 42 with the beveled surfaces 44 of the disks 31 and 32, and thus the shaft 15 is rotated at its greatest speed. To reduce the speed of rotation of the shaft, the lever 23 may be operated to move the roller 19="toward the periphery of the disks 31 and 32, to cause its flat surface 41 to engage with the flat surfaces 43 of these disks,

ing action of the roller 50 against the dis 5 28 and 32.

The reversal of the shaft 15.is effected by this engagement being effected by the wed swinging the lever 54 in the direction opposite that described, thereby moving the roller 50 out of engagement with the disks 28 and 32 and causing the roller 49 to wedge between the disks 27 and 31, in a manner similar to that described of the roller 50, with the result of disen aging the clutch from the disk 31, and b urther movement (5f the shaft 15 to the le t in the drawings, causing the other clutch to engage the disk 32., The rollers 19 and 49 are thus caused to en age with the disks 27, 31 and 32, and the s aft 15 is thereby rotated'in the opposite direction, the disk 31 operating upon suchreversal as an idler. It will be noted that when the roller 19 Ismoved into en agement with the disks,

into position for riving the shaft in either transmission,; and, moved away fromthe axis of, the drive-roller to produce low speed transmission, the maximum degree of efii ciency in ower, especially when running on low spec ,is effected.

It will also be noted that by constructin transmission-mchanism in accordance 'wit 1- .my invention, the pressure exerted between the disks and rollers ma be varied at will to roducel'the-degree o pressure required un er var-yin loads. Thus, when a light load is carrie by the engine,the contact of these disks and rollers may be caused to be comparatively light, whereas when the load is heavy the-contact ressure may be uickl and readilyincrea to that require wit 1 the result that the engine is caused to perform the work required without Waste of energy from excess contact pressure between the disks and rollers.

tween said pair of disks to' rotate independently of the driven-shaft and be movable longitudinally, a drive-shaft, a roller rovid-ed on the drive-shaft and movable into engagement with a disk of said pair and with said third disk, and means constructed and arranged to be moved into and out of driving engagement with the other disk said pair and said third disk for equalizing lateral thrust on the driven-shaft.

2, In a roller-transmission mechanism, the

con'ibination of a driven-shaft, a pair of CO? operating friction-disks supported .to rotate with said shaft,a third disk supported beween said pair of disks to rotate inde pendently at the driven-shaft and be'mo able longitudinally, a drive-shaft, a roller provided on the drive-shaft and movable into engagement with a disk of said pair and with said third disk, a third shaft, and

a roller on said third shaftv adapted to be moved into and out of driving engagement with the other disk; of said pair and with said thirddiskQ 3. In-a roller-transmission mechanism, the

combination of a driven-shaft, a pair of cooperating friction-disks on said. shaft, a third disk journaled and. movable longitudinally of the shaft between said pair, a drive-shaft, a roller carried by the drive shaft and movable into engagement with a "disk of said pair and with said other disk, a

third shaft, and a roller carried by said third shaft and adapted to be moved into and out of driving engagement With the other disk of said pair and with said third disk; f

4%. Ina roller-transmission mechanism, the eombinatlon of a driven-shaft, a pair of cooperating frictioirdisks provided withbew I eled-surfaces on said shaft, a third disk having beveled friction-surfaces and movable longitudinally of the shaft between said pair, a drive-shaft, a roller provided on said driveshaft and having a beveled friction-surface movable into engagement with a disk of said pair and with said third disk, a third shaft, and a roller carriodby said last-named shaft having a beveled surface and movable into engagement with. the other disk of said pair and with said third disk.

5. In a roller-transmission mec'hanisn1;tl1e combination of a driven-shaft mounted. to

move longitudially, a pair of friction-diskscarried by said shaft and movable therewith and a thirddisk rotatableindependently of the shaft and movable longitudinally thereof,v

a drive-shaft, a roller on said drive-shaft,

' and a second roller, said rollerscoiiperating with sand disks, for the purpose set forth.

the other disk ofsaid .of said disks, I adapted to be alternately moved into engage *6. In a roller-transmission mechanism, the

- combination. of a; drive -shaft, a frictionroiler carriedby said shaft, a driven shaft,

a pairv of disks on said driven shaft adapt-ed torotate with it, an idlerfriction-disk jour naled on the shaft between said pair of. disks, and an idler-rollen said friction roller and idler-roller cocperating with said disks'and constructed and arranged to be moved into and out of driving engagement wlth the res gage with said fixed disk and the'adjacent disk of said pair, and means for clutching pair to the shaft, for the purpose set forth. 3 .4

8. In a roller-transmissionmechanism, the combination of drive-shaft, afriction roller carried b said shaft a driven shaft slidable longitu inally in its bearings,"a disk fixed on said driven-shaft to'rotate therewith,a' pair of disks journaled on said drivenshaft in positionto be engaged by said. fric tion roller, an idler-roller jou'rnaled in position to engage with said fixed diskand the adjacent disk of said pair, and means'movable with said shaft to engage with-the other of saidpair,-for clutching it to thesha-ft, for the purpose setforth. I v

9. In a. roller-transmission mechanism, the combination. of a driveshaft, a'frictionroller carriedby said shaft, a driven shaft, friction-disks carried by, said driven-shaft with relation to which said roller adjustable on its shaft into-engagement with a pair and. a pair of idler-rollers ment with the adjacent coiiperating disks, for the purpose "set forth. p

10. In a troller-transmission mechanism, the combination ofa drive-shaft, a frictionroiler carried by said shaft, a driven-shaft, a pair of disks carried by said driven shaft and movable with the shaft, a pair of disks journale'd thereon between said first-named pair in position torbe engaged by said roller,

idler-rollers journaled in position to be moved into engagement with the adjacent one of said first pair of disks and the adjacent one of said second pair of disks, and

'means for clutching the disk of said second pair, which is out ofengagement with the idler, to the shaft, for the, purpose set forth.

11. In a roller-transmission mechanism, the combination of a drive-shaft, a frictionroller carried by said shaft, a drivemshaft, a pair of disks carried by said driven-shaft and movable with the shaft, a pair of disks journ'aled thereon between said first named ,pair in position to be engaged by said roller,

structed and arranged to alternately clutch the disks of said second pair to the shaft by movement of the shaft in opposite directions, for the purpose set forth.

12. In transmission mechanism, the combination of a driven-shaft, a rotatable member carried by said shaft, a drive-shaft, a head carried by said drive shaft and provided with a tubular extension projecting beyond the shaft, a support extending at one end into said tubular extension, a sleeve rotatably confined on said support, a rotatable member on said sleeve cotiperating with said first-named rotatable member,and means for moving said forked support to move it and the sleeve in said tubular extension.

13. In transmission mechanism, the. combination of a drivenshaft, a rotatable member carried by said shaft, a drive-shaft, a head" carried by the drive-shaft and having a tubular extension projecting beyond the shaft, a support for the outer end of the drive-shaft having a cylindrical portion ter minating in a head, a second head on said cylindrical portion of the support, a sleeve rotatably confined between said heads on .said cylindrical portion, a rotatable member secured on said sleeve to rotatewith it, and means for moving said support" and sleeve' in the tubular extension longitudinally thereof.

14. In a roller-transmission mechanism, the combination of a driVen Sha e ft, a pair of cooperating friction-disks supported to rotate with said shaft, a third disk' supported between said pair -.of disks to rotate independently of the driven-shaft and be mov- .able longitudinally thereof, a drive-shaft, a roller on the drive-shaft movable into engagement with adisk on said pair and with said.third disk, andmeans adapted to be moved into and out of driving engagement with the other disk of said pair; and with said third disk to act against said disks power from one disk to the other.

15. In a roller-transmission mechanism,

the combination of a driven-shaft, a pair of coiiperating friction disks supported to rotate with said shaft, a third disk supported between said pair of disks to rotate independently of the driven-shaft and be movable longitudinally thereof with respect to said pair of disks, a drive-shaft extending at right-angles to the driven-shaft and with respect to which said pair of disks and said t hird disk are movable transversely thereof, a roller provided on the drive-shaft and movable into engagement with the disk of said pair and with said third disk, and means operating between the other disk of said pair and said third disk, for the purpose set forth.

16. In a roller-transmission mechanism, the combination of a drive-shaft, a friction roller carried by said shaft, a driven-shaft, a. pair of disks supported by said drivenshaft and adapted to rotate with it, one of said disks having a beveled face, an idler friction-disk carried on the driven shaft between said pair of disks and having a beveled face opposed to the beveled face on the disk of said pair, and an idler-roller having a. beveled portion, said friction roller and idler-roller coiiperating'with said disks, for the purpose set forth.

17. In a. roller-transmission mechanism, the combination of a rotary shaft, apair of cooperating friction-disks supported to ro tate with said shaft, a third disk supported on said shaft between said pair of disks. to rotate independently of said shaft and'be movable longitudinally with relation to said pair of friction disks, a second shaft, a roller provided on said second shaft and movable into engagement with a disk of said pair and with said. third disk, and means constructed and arranged to be moved into and out of driving engagement with the other. disk of said pair and with said third disk for moving the disks which are engageable by said 

